JP6694667B2 - Gusset packaging bag - Google Patents

Description

  The present invention relates to a gusset packaging bag, and more particularly to a gusset packaging bag that can be easily opened and can be used as a container after the opening without transferring the object to be packaged.

  In recent years, microwave ovens have rapidly developed and spread, and are now one of the necessities in ordinary households. With this spread, a wide variety of processed foods for microwave ovens have been developed and commercialized, and are distributed and sold in large quantities on the market. Most of these processed foods are packed in a packaging bag of a predetermined shape, and these packaging bags are devised so as to be compatible with each processed food.

  For example, Patent Document 1 below describes two different types of packaging bags. One of the packaging bags is composed of a rectangular film in which a base material layer, an intermediate layer, and a sealant layer are laminated. An end seal part that seals the open end is provided, and a cut is made near the upper end part of the back seal part in a direction orthogonal to the length direction of the back seal part. In addition, a half cut line extending parallel to the spine seal part is provided. According to this packaging bag, after tearing the bag body from the back seal portion in the left-right direction, the bag body is torn in the vertical direction along the half-cut line, and after opening, it can be used as a saucer.

The other packaging bag is provided with half-cut lines near the upper and lower end portions on the back surface of the bag and extending in a direction perpendicular to the length direction of the back seal portion and across the back seal portion. This packaging bag can also be used as a saucer after tearing the bag body from the back seal part along the half-cut line in the left-right direction.
Further, Patent Document 2 described below describes a packaging bag that can easily open the surface sheet when the gusset packaging bag is opened and that can smoothly open the sheet without dispersing the force.

JP, 2008-081911, A JP, 2014-069883, A

  Of the two packaging bags described in Patent Document 1, one of the packaging bags needs a strong tearing force at the time of tearing to the left and right, and if it is opened with a large force, it will not be packaged at the moment when it is opened. Objects may jump out. For this reason, if the object to be packaged contains liquid, the liquid flows out and pollutes the surrounding area, and if the object to be packaged is heated in a microwave oven, there is a risk of being burned by hot water. is there. In addition, even if the back seal is torn from the cut to the left and right, it is difficult to open along the assumed half-cut line, and it becomes easy to form a random opening shape. Therefore, when using it as a saucer, the opening edge is There is a problem that it is not torn straight and has an awkward shape, and it does not look good and lacks design.

On the other hand, since the other packaging bag has the half-cut lines formed near both ends of the bag, it does not seem to be torn to both edges like the above packaging bag. However, as a result of the experiment, it is similarly difficult to open along the half-cut line, and if it is torn to the left and right, it will be torn to both edges of the bag body beyond the half-cut line, and the same problem as the above-mentioned packaging bag will occur. There is. Also, since the half-cut line is provided on the film surface that wraps the object to be packaged, the mechanical strength of this part is lower than other parts, and the bag body is broken during transportation and heating in a microwave oven. Otherwise, the packaged item may jump out.
Also, since these two packaging bags are both shallow, if the bag is torn, the packaged product will jump out to the outside, and especially when used in a microwave oven, there is a risk that hot water will scatter and cause burns. is there.
Further, the packaging bag described in Patent Document 2 is a gusset type, and opening is smooth, but an opening of an arbitrary size cannot be formed and it cannot be used in a microwave oven.

  The present invention has been made in order to solve the problems of the above-mentioned prior art, and an object of the present invention is to open a desired size from a desired position in a desired size with a neat opening shape, and then to open the object after opening. An object of the present invention is to provide a gusset-type packaging bag that can be used as a container without transferring the package to another.

  Another object of the present invention is to provide a safe and secure gusset packaging bag that does not burst even if the object to be packaged is heated in a microwave oven as it is.

  Still another object of the present invention is to provide a gusset packaging bag with excellent productivity that can be easily and inexpensively manufactured by an automatic packaging machine.

In order to solve the above-mentioned problems, the gusset packaging bag according to the first aspect of the present invention is a bottom film, a pair of side films facing each other, which are connected to both side edges of the bottom film and are folded, and both side films. was stuck twofold ties substantially central portion in the upper edge ends at a top film provided with back seal portion forms a cylindrical member that opens, and opens the previously thermally welded seal at one end, the opening at the other end the The top film is provided with opening cut lines along both side edges of the side film, and the opening cut line is provided on the upper edge of the side film. And a plurality of tear cut lines that are heat-welded together and partially and in the longitudinal direction from the upper end of the back seal portion toward the surface of the top film in a direction orthogonal to the longitudinal direction of the back seal portion. Is provided, and the tear from the tear cut line is cut along the tear cut line after reaching the tear cut line on both side edges through the tear of the top film. The upper surface film is characterized in that an opening having a predetermined size can be formed by tearing from the tear cut lines at a plurality of positions.

  A gusset packaging bag according to a second aspect is the gusset packaging bag according to the first aspect, wherein the opening cut line is a groove formed by half-cutting the upper surface of the film, a plurality of through holes or non-through holes, and a hole formed by mixing these. Is formed as either a through hole or a non-through hole that is linearly arranged at a predetermined interval.

  A gusset packaging bag according to a third aspect is characterized in that, in the gusset packaging bag according to the first aspect, the opening cut line is formed by a recessed groove having a predetermined width, length and depth.

The gusset packaging bag according to the fourth aspect is the gusset packaging bag according to any one of the first to third aspects, wherein the tear cut line has a predetermined width and a long length on both joint surfaces of the back seal portion attached with the palm. It is characterized in that it is formed by a concave groove having a depth and a depth.

A gusset packaging bag of a fifth aspect is the gusset packaging bag of any one of the first to fourth aspects, wherein the bag body is made of one plastic film.

A gusset packaging bag of a sixth aspect is the gusset packaging bag of the fifth aspect, characterized in that the plastic film is a laminated film in which at least a base material layer and an easily peelable sealant layer are laminated.

The gusset packaging bag of the seventh aspect is characterized in that, in the gusset packaging bag of the sixth aspect, the heat-welding seal of the opening is welded with a higher strength than the heat-welding of other portions.

According to the gusset packaging bag of the first aspect of the present invention, the back seal portion can be easily torn from the notch of the tearing cut line, and a desired size can be obtained from any position on the upper surface to form a neat opening shape. You can open it with. That is, when the back seal portion is torn in the wake of the cut line tearing, the top surface film is torn up toward both side edges, reaching its tip on both ends of the opening cut line, tearing direction back seal It changes from the direction orthogonal to the part to the direction parallel to it, and is torn along the opening cut lines at both ends. Since this opening is performed along the opening cut line from any part of the back seal part through the top film, it can be opened to a desired size with a clean opening shape, and the opening piece can be opened from the top film. Can also be removed. In addition, after opening, since it is opened in a desired size and with a clean opening shape, it does not have to be transferred to another item and looks good as it is. It can be used as a deep container.

  According to the gusset packaging bag of the second aspect, the opening cut line is linearly formed with a groove formed by half-cutting the upper surface of the film, a plurality of through holes or non-through holes, and a hole obtained by mixing these holes at a predetermined interval. By arranging through holes or non-through holes arranged in an array, it is possible to open with a clean opening shape along these cut lines. Further, in each of these non-through holes or through holes, the mechanical strength does not decrease even if the film provided with the holes is joined and heat-sealed with another film to be sealed. As a result, the packaging bag is hygienic because there is no invasion of bacteria from the outside through the opening cut line during distribution and storage, and it is hygienic, and there is no rupture or rupture of the bag during transportation. Will be excellent.

  According to the gusset packaging bag of the third aspect, since the opening cut line is formed by the recessed groove having the predetermined width, length and depth, even when the internal pressure of the bag body rises during microwave heating. ， Can be used as a microwave oven safely and safely without being expelled from the groove. In addition, after heating in a microwave oven, the size of the package can be adjusted to an arbitrary size and the package can be opened with a clean opening shape. There is no risk of contaminating the surroundings or burns to the hands when the package is opened. Can be used with a container without transferring it to another.

According to the gusset packaging bag of the fourth aspect, even when the internal pressure of the bag body rises during heating in the microwave oven, it is not released from the recessed groove and does not burst, and can be used safely and safely for microwave oven use. ..

According to the gusset packaging bag of the fifth aspect, the packaging bag can be easily produced by the automatic packaging machine.

According to the gusset packaging bag of the sixth aspect, peeling at the opening cut line and the tear cut line becomes smooth.

According to the gusset packaging bag of the seventh aspect, since the heat-sealing seal of the opening is welded with a higher strength than the heat-sealing of other portions, the sealing strength of the opening at both ends of the tubular body is high. The object to be packaged is not released to the outside. On the other hand, the other parts, the heat-welded parts at the bent parts and the back seal part are easily separated from the film at the time of opening, so that the opening becomes easy.

It is a perspective view of the gusset packaging bag concerning Embodiment 1 of the present invention. 2A is a sectional view taken along line IIA-IIA in FIG. 1, and FIG. 2B is an enlarged view of a IIB portion in FIG. 2A. FIG. 2 is a plan view of a plastic packaging material for making the gusset packaging bag of FIG. 1. 4A is an enlarged view of the IVA portion of FIG. 3, FIG. 4B is a sectional view taken along line IVB-IVB of FIG. 4A, and FIG. 4C is a sectional view showing a modification of FIG. 4B. 5A is an enlarged view of the VA portion of FIG. 3, FIG. 5B is a sectional view taken along line VB-VB of FIG. 5A, and FIG. 5C is a sectional view showing a modification of FIG. 5B. FIG. 6 shows the unsealing state of the unsealing cut line when the microwave oven is used. FIG. 6A is a cross-sectional view before unsealing, FIG. 6B is in the middle of unsealing, and FIG. 7 shows the opened state of the gusset packaging bag of FIG. 1, FIG. 7A is a perspective view before the opening, and FIG. 7B is a perspective view after the opening. It is a perspective view of the gusset packaging bag concerning Embodiment 2 of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a gusset packaging bag for embodying the technical idea of the present invention, and is not intended to specify the present invention thereto, and the scope of the claims Are equally applicable to the other embodiments included in.

[Embodiment 1]
A gusset packaging bag according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 is a perspective view of the gusset packaging bag according to the first embodiment of the present invention, FIG. 2A is a sectional view taken along the line IIA-IIA of FIG. 1, and FIG. 2B is an enlarged view of the IIB portion of FIG. 2A.

Gusset packaging bag according to Embodiment 1 of the present invention (hereinafter, simply referred to as "packaging bag".) 10, FIG. 1, as shown in FIG. 2, a bottom film 10a, on both sides edge of the bottom film Both ends are opened with a pair of opposed side surface films 10b and 10c having connection folds and an upper surface film piece 10d provided with a back seal part 13 connected to the upper end edges of these side film and having a substantially central portion bonded together. A cylindrical body is formed, one opening 10e is sealed in advance, and the other opening 10f is formed of a bag body for packing a packaged object (not shown) after sealing and packaging the packaged object (not shown). piece 10d is provided with a opening cut line 11 on both sides edge, both side film 10b, is thermally welded to the edge on the 10c, also cut lines 12 tear the back seal portion 13 (see FIG. 3) provided It has been configured. The upper surface film piece 10d is composed of a pair of upper surface film pieces 10d ₁ and 10d ₂ , and the one end opening 10e is sealed at the end seal portion 14 and the other opening 10f is sealed at the end portion. It is the seal portion 15.

  Hereinafter, the individual films of the bottom film, the side film and the top film that compose this packaging bag will be described in detail.

First, as shown in FIGS. 1 and 2, the bottom film 10a is formed of a substantially rectangular film having a predetermined length and width, and both side edges in the width direction are side films 10b and 10c, respectively. They are thermally welded under the edge of the. Further, the bottom film 10a and the side films 10b and 10c are welded portions 10ab and 10ac which are heat-welded by arranging both end edges of each with a predetermined width. These welded portions are located on the outer periphery of the bottom film 10a and serve as a kind of frame for expanding the bottom film 10a. That is, when the packaging bag is placed on a flat surface, the bottom film 10a can be placed in a stable state in which the welded portions of the bottom film 10a act as a frame to spread and are stable. When the tray is put in, it is possible to position and fix the tray by these welding parts.

As shown in FIGS. 1 and 2, the pair of side films 10b and 10c are made of a substantially rectangular film having a predetermined length and width, and are arranged at a substantially central portion in the longitudinal direction along the longitudinal direction. folding portion folded in a substantially V-shape with a predetermined width dimension Te (Note that the folded portion of the gusset.) 10b ', 10c' provided in the longitudinal direction on each edge is the upper surface film pieces 10d _1, 10d ₂ and heat welded.

As shown in FIGS. 1 and 2, the upper surface film piece 10d is composed of two substantially rectangular upper surface film pieces 10d ₁ and 10d ₂ having a predetermined length and width, and these film films are formed. The piece is heat-welded over the lengthwise direction with both side edges in the widthwise direction having a predetermined width. The heat-welded part of the gastric palm becomes a back seal portion 13, and a tear cut line 12 is provided in this portion. This tear cut line will be described later. Each top film pieces _10d 1, 10d each opening in the side edge cut line 11 in ₂ (FIG. 2B see) is provided with both side film 10b, is thermally welded to the edge on the 10c.

As shown in FIG. 4A, the unsealing cut line 11 is formed by arranging a plurality of slits 11 ₁ each having a groove having a predetermined width, length and depth in a line at a predetermined interval. .. The opening cut line 11 will be described with reference to a plastic packaging material 100 for manufacturing a packaging bag described later.

Cut lines 12 tear also, as shown in FIG. 5A, consists of those sequences predetermined width, a plurality of slits 21 ₁ consisting of recessed groove length and depth in a row at predetermined intervals There is. This tear cut line 12 will also be described with reference to a plastic packaging material 100 for producing a packaging bag described later.

  The bottom film 10a, the two side films 10b and 10c, and the top film 10d described above are made of the plastic packaging material 100 made of one plastic film. That is, the packaging bag 10 is manufactured using this plastic packaging material 100.

  Hereinafter, the plastic packaging material 100 will be described with reference to FIG. Note that FIG. 3 is a plan view of a plastic packaging material for making a gusset packaging bag.

Plastic packaging material 100, as shown in FIG. 3, a predetermined length, is made of a plastic film 10 ₀ long with the width and thickness.
The plastic film 10 ₀ is to use a laminated film obtained by laminating at least a substrate layer and a peelable sealant layer. The base material layer is a biaxially oriented plastic film such as a biaxially oriented polypropylene film, a biaxially oriented nylon film, or a biaxially oriented polyester film. The easily peelable sealant layer is a heterogeneous multilayer polyolefin resin film or the like. Note that the easy-open film is already known as having excellent straight-cutting property (longitudinal direction), and this known film is used in this embodiment. When such a laminated film is used, when the top film 10d is torn from the back seal portion 13, the top film 10d is torn linearly from there toward the opening cut line.

Plastic packaging material 100, a predetermined length L, a made of plastic film 10 ₀ long with the width W and thickness, the plastic film 10 ₀ of the long is the longitudinal center of the predetermined width dimension W ₁ and the bottom film area 10 _a, the first and the folded area 10 _AB, 10 _AC are folio has been thermally welded in a predetermined width dimension W within ₁₂ respectively extending from both sides edges of the bottom film area, these Side film areas 10 _B and 10 _C each extending from the folding area and folded to have a predetermined width W ₂ , and _two side edges within the predetermined width W ₂₃ are folded and heat-welded from both end edges of these side areas. The second bending areas 10 _BD1 and 10 _CD2 and the upper film piece areas 10d ₁ and 10d ₂ extending from these bending areas are divided. The respective side edge areas a1 and a2 of the upper surface film piece areas 10d ₁ and 10d ₂ are back- adhering areas which become the back seal portion 13 by being palm-sealed and heat-welded. Further, the top film 10d is formed by the top film piece areas 10d ₁ and 10d ₂ . It should be noted that the dividing line shown in FIG. 3 is shown for ease of explanation, and the actual plastic packaging material does not have such a dividing line.

Long plastic film 10 ₀ of scale has a length L, a width W and wall thickness are the type of articles to be packaged, selected by size, etc., it is determined. The widths W ₁ and W _{2 of the} bottom film area 10A and the side film areas are also determined by the object to be packaged. The width lengths W ₁₂ and W ₂₃ of the first and second bent portions and the third and fourth bent portions are about 3 to 10 mm. The total width of the top film pieces 10d ₁ and 10d ₂ is approximately the same as the width of the bottom film area. Further, among the upper top film pieces _10d 1, 10d ₂ of the back lined areas a1, a2, it is one of the back lined area a2 is longer 8 to 20 mm. The long protruding portion serves as a knob when the back seal portion 13 is opened.

An opening cut line 11 is formed in each of the second folding areas 10 _BD1 and 10 _CD2 . These unsealing cut lines 11 are on the first surface (the surface on which the sealant layer is provided) of each film of the second folding areas 10 _BD1 and 10 _CD2 , and each upper surface film 10d ₁ when folded. It is formed in the area located on the 10d ₂ side. The opening cut line 11 may be in the same bent position.

  The configuration of the opening cut line will be described with reference to FIG. 4 shows an opening cut line, FIG. 4A is an enlarged view of the IVA portion of FIG. 3, FIG. 4B is a sectional view taken along line IVB-IVB of FIG. 4A, and FIG. 4C shows a slit of the modification of FIG. 4B. It is the sectional view shown.

The opening cut lines 11 of the second folding areas 10 _BD1 and 10 _CD2 have the same configuration. One opening cut line 11, as shown in FIG. 4B, a predetermined width along the longitudinal direction, a plurality of slits 11 ₁ consisting of recessed groove length and depth are arranged in a row at predetermined intervals It has become a thing. That is, the slits 11 _1, as shown in Figure 4B, and is formed with a concave groove 11a having a predetermined depth. The concave shape of the concave groove 11a may be an arbitrary concave shape, for example, a shape in which the bottom is thinnest and the thickness gradually increases from the bottom to the surface. The opening cut line 11 is heat-welded to the side film, and the welded upper surface film can be smoothly torn along the opening cut line. Further, when the pressure of the bag body when using a microwave oven increases, the concave groove 11a of the slit 11 ₁ is broken only minimal site Relieve upward pressure to the outside, it can be prevented bursting of the bag.

The unsealing cut line 11A of the modified example is formed by a slit provided with a concave groove 11a and a crack 11b having a predetermined depth, which is placed at the bottom of the concave groove. According to the unsealing cut line 11A, the upper surface film 10a can be torn more smoothly along the cut line. Further, when the time of a microwave oven operating pressure of the bag body is increased, easily further torn slits 11 ₂ can be prevented bursting of the bag.

  The configuration of the tear cut line will be described with reference to FIG. 5 shows a tear cut line, FIG. 5A is an enlarged view of the tear cut line VA portion of FIG. 3, FIG. 5B is a cross-sectional view taken along line VB-VB of FIG. 5A, and FIG. 5C is of FIG. 5B. It is sectional drawing of the tearing cut line of a modification.

The tear cut line 12 is formed in the back pasting areas a1 and a2 ( see FIG. 3) that will be the back seal portion 13. This cut line 12 is composed of a plurality of slits (slits), and as shown in FIG. 3 and FIG. 5B, is formed from a groove having a predetermined width, length and depth along the longitudinal direction. The plurality of slits 12 ₁ are arranged in a line at a predetermined interval. These tear slits 12 _1, as shown in FIG. 5B, and is formed with a concave groove 12a having a predetermined depth. The recessed shape of the recessed groove 12a may be an arbitrary shape, for example, the bottom may be thinnest and the thickness may gradually increase from the bottom to the surface. The back sticking area a2 provided with a plurality of slit slits is bonded to the other back sticking area a1 to form a back seal portion 13.

By providing the tear cut line 12 in the spine seal portion 13, the top film 10d can be torn from any place. Further, when the pressure of the bag body when using a microwave oven increases, escape upward pressure torn concave groove 11a of the slit 11 ₁ to the outside, it can be prevented bursting of the bag.

  As shown in FIG. 5C, the tearing cut line 12A of the modified example is formed by a slit provided with a concave groove 12a and a crack 12b of a predetermined depth put in the bottom of the concave groove. By providing the tear cut line 12A in the spine seal portion 13, the top film 10d can be torn from any position.

  Returning to FIG. 3 again, the production of a packaging bag using the plastic packaging material 100 will be described. The packaging bag is manufactured by an automatic packaging machine. Since an automatic packaging machine is known, a description thereof will be omitted.

To make the packaging bag 10, first, a plastic packaging material (hereinafter, also referred to as a packaging material) 100 is set in an automatic packaging machine (not shown). The first packaging areas 10 _AB and 10 _AC of the bottom film area 10 _A are folded in two by the automatic packaging machine, and the packaging material thus set is welded by two folds to form welded portions 10ab and 10ac (FIG. 2A). These welded portions become the first and second corners of the bottom of the bag when the bag is formed.

Then, both sides film area ₁₀ B, 10 second folding area ₁₀ BD1 of _{C, 10 CD1} is welded portion 10Bd ₁ opening cut line 11 is two-folded heat welded so as to face the upper surface film side, 10 cd ₂ ( 2A) is formed. Further, these welded portions become the third and fourth corners of the upper part of the bag when the bag is formed. Thereafter, the back sealed portion 13 is formed by bonding the twofold of both sides edges of the top film pieces 10d _1, 10d _2, is cut in the longitudinal direction of the predetermined length, the tubular body opposite open ends each formed To be done.

As a result, the welded portions 10ab, 10ac, 10bd ₁ , 10cd ₂ surrounded by the wide bottom film 10a, the short side films 10b, 10c, and the top film 10d having substantially the same size as the bottom film are heat-welded. Are the first to fourth corners, and a gusset-type short tubular body with both ends open is formed. In this tubular body, one end 10e is first heat-sealed to form an end seal portion 14, and the other opening 10f is loaded with an object to be packaged and heat-sealed to form an end seal portion 15. Is formed, and the packaging bag 10 in which the articles to be packaged are wrapped is formed. The object to be packed can be packed by placing the object to be packed in a box-shaped tray. By using this plastic packaging material 100, this packaging bag can be easily produced by an automatic packaging machine. Of course, you may produce with a separate film.

The formed packaging bag 10 is heat-sealed at the end seal portions 14 and 15 at both ends of the bag body, the back seal portion 13 and four corners, respectively. The seal portions 14 and 15 are heat-welded to have a higher welding strength than the other back seal portions 13 and 10bd ₂ and 10cd ₂ forming the third and fourth corner portions. By increasing the strength of the end seals 14 and 15 in this way, it is of course possible that the article to be packaged does not jump out of these places, and when opened, from the third and fourth corners. The top film 10d can be easily opened. Further, even when the internal pressure rises when used in a microwave oven, the top film 10d is peeled off at the third and fourth corners, and the rising pressure is released from the slits forming the opening cut line 11, so that the bag body Does not burst. Further, the pressure when the microwave oven is used is released from an arbitrary position on the tear cut line 12 of the back seal portion 13.

The opening of the mushroom used in this microwave oven will be described with reference to FIGS. 6 shows the opened state of the unsealing cut line when the microwave oven is used, FIG. 6A is a sectional view before unsealing, FIG. 6B is in the middle of unsealing, and FIG. 6C is a sectional view at the time of unsealing. When an object to be packaged containing moisture, for example, a packaging bag 10 in which food is packaged is heated in a microwave oven, the moisture contained in the food vaporizes and the pressure inside the bag increases. Due to this pressure increase, the bag body swells, and the rising pressure is applied to the top film piece 10d. When elevated pressure is applied to the upper surface film 10d, third, fourth weld portion 10bd _2, 10cd 2 corners is lifted upward, the welded portion is started peeling, the opening cut lines 11 the peeling progresses The concave groove 11a constituting the slit is broken and the boosting force is released. Figure 6A~ 6C show one of the open state of the welded portion 10 cd _2.

A method for opening the packaging bag will be described with reference to FIG. 7. 7A and 7B are views for explaining the opening method of the gusset packaging bag of FIG. 1, FIG. 7A being a perspective view before opening and FIG. 7B being a perspective view after opening.
The packaging bag 10 can be opened from an arbitrary position on the upper surface with a desired size and a clean opening shape. That is, when the tear from the point indicated by the dotted line of the back seal portion 13 (FIG. 7A), the upper surface film 10d _1, 10d ₂ are torn up toward both side edges, the opening cut line 11 of the tip ends When it reaches, the tearing direction changes from a direction orthogonal to the spine seal portion to a parallel direction, and tears are made along the opening cut lines 11 at both ends. Since this opening is performed along the opening cut line from any part of the back seal part through the top film, the opening size can be set to a desired size and the opening can be performed in a clean opening shape. Pieces can also be cut from the top film (Figure 7B). In addition, after opening, since it is opened in a desired size and with a clean opening shape, it does not have to be transferred to another item and looks good as it is. It can be used as a deep-sea container.

  The packaging bag 10 can also be used for a microwave oven as described above, that is, even if the object to be packaged is heated in the microwave oven, it does not burst and can be used safely and safely. After being heated in a microwave oven, it can be opened in an arbitrary size with a clean opening shape, so there is no risk of contaminating the surroundings or getting burns on the hands when opening, and after opening, it is packaged. Can be used with containers without transferring anything to another.

[Embodiment 2]
A gusset packaging bag according to the second embodiment of the present invention will be described with reference to FIG. 8. 8 is a perspective view of the gusset packaging bag according to the second embodiment.

  The gusset packaging bag 10A according to the second embodiment is the same as the packaging bag 10 according to the first embodiment except that a part of the configuration, that is, the opening cut line and the back seal portion are changed. In the following description, the modified configuration will be described in detail, and the description of the common configuration will be omitted.

Gusset packaging bag according to the second embodiment (hereinafter, referred to. Packaging bag) 10A, like the packaging bag 10 of the first embodiment, the upper surface film 10d is provided with a opening cut line 11B on both sides edge, both sides surface film 10b, is thermally welded to the edge on the 10c, also has a structure in which a cut line 12B tear the back seal portion 13.

The unsealing cut line 11B is a line in which perforations are linearly arranged instead of the respective _unfolding areas 10 _BD1 and 10 _CD2 (see FIG. 3) of the plastic packaging material 100. Each folding area provided with the perforation is folded and heat welded, respectively welded portion 10bd _1, 10cd ₂ is formed (see FIG. 9). The unsealing cut line 11B is not limited to perforations, and may be other ones, such as continuous (eg, half cut line) or discontinuous grooves, or a plurality of discontinuous through holes or non-through holes. Any of those arranged linearly at intervals may be used.

  Moreover, the tear cut line 12B is provided with a plurality of notches at predetermined intervals in the longitudinal direction of the back seal portion 13. These notches are formed in the direction perpendicular to the length direction of the back seal part. This notch (notch) is to create a trigger for tearing the back seal portion, and if it is a generally known notch such as an I-shaped notch, a V-shaped notch, or a U-shaped notch. Good. According to this packaging bag 10A, the bag body can be opened greatly to the left and right, and the opened bag can be directly used as a saucer for food during meals.

10,10A gusset packaging bag 10a bottom film 10b, 10c side films 10d top film 10e, 10f opening _10d 1, 10d ₂ top film piece 10 ₀ plastic films 11, 11A, 11B opening cut lines ₁₁ 1, 11 ₂ slit 11a recessed groove 11b Crack 12, 12A, 12B Rip cut line 12 ₁ , 12 ₂ Slit 12a Ditch groove 12b Crack 13 Back seal part 14, 15 End seal part 100 Plastic packaging material

Claims (7)

Bottom film,
A pair of opposing side films having folds connected to both side edges of the bottom film,
A tubular body with both ends opened is formed with the top film that is connected to the upper edges of the both side films and has a back seal portion formed by sticking the substantially central portion together.
The opening at one end is formed by heat-sealing in advance, and the opening at the other end is made up of a bag body for loading the packaged object and then heat-sealing it to wrap the packaged object.
The top film is provided with opening cut lines along both side edges and is heat-welded to the upper edge of the side film together with the opening cut line, and in the direction orthogonal to the longitudinal direction of the back seal part, A plurality of tear cut lines are provided partially and in the longitudinal direction from the upper end of the back seal portion toward the surface of the upper surface film,
The tear from the tear cut line, after reaching the open cut line of the both side edges through the tear of the upper surface film, is configured to be split along the open cut line,
The upper surface film is characterized in that an opening of a predetermined size can be formed by tearing from a plurality of tearing cut lines.
Gusset packaging bag.   The unsealing cut line is either a groove formed by half-cutting the upper surface film surface, a plurality of through holes or non-through holes, and a through hole or a non-through hole in which holes formed by mixing these are linearly arranged at a predetermined interval. The gusset packaging bag according to claim 1, wherein the gusset packaging bag is formed of:   The gusset packaging bag according to claim 1, wherein the unsealing cut line is formed of a recessed groove having a predetermined width, length, and depth.   4. The tear cut line is formed by a recessed groove having a predetermined width, length and depth on both joint surfaces of the back seal part that is pasted together. Gusset packaging bag described in.   The gusset packaging bag according to any one of claims 1 to 4, wherein the bag body is made of one plastic film.   The gusset packaging bag according to claim 5, wherein the plastic film is a laminated film in which at least a base material layer and an easily peelable sealant layer are laminated.   The gusset packaging bag according to claim 6, wherein the heat-sealing seal of the opening is welded with a higher strength than the heat-sealing of other portions.